Abstract: A system for controlling power applied to a resistor array within a heating pad is provided. The system includes a power supply for connecting the system to a power source, a resistor array positioned within a heating pad for generating heat based on a selected heat level, and a control unit for determining the level of heat to be generated and the duration of time power is applied to the resistor array. In an embodiment, the control unit includes a timing device for generating one of an initial set time period and a shortened time period, at the expiration of either of which the supply of power to the system is terminated. The control unit further includes a mechanism which can initiate the shortened time period in place of the initial set time period. The mechanism may be used to reset the shortened time period to its full duration, after an elapsed period, each time the mechanism is activated.